zip-rs Zip up to 8.x AES entry reader src/aes.rs by_index_decrypt signature verification

Summaryinfo

A vulnerability classified as problematic was found in zip-rs Zip up to 8.x. This affects the function by_index_decrypt of the file src/aes.rs of the component AES entry reader. Executing a manipulation can lead to signature verification. This vulnerability appears as CVE-2026-115906. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in zip-rs Zip up to 8.x. This vulnerability affects the function by_index_decrypt of the file src/aes.rs of the component AES entry reader. The manipulation with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect integrity. CVE summarizes:

zip is a zip library for Rust that supports reading and writing simple ZIP files. From 0.6.0 until 9.0.0, the AES entry reader in src/aes.rs verifies its HMAC only when the attacker-controlled data counter reaches zero. If the underlying bounded reader reaches the real end of the archive while data_remaining is still positive, or if an encrypted entry has no payload, the reader can return a clean end of stream without reading and comparing the authentication tag. Applications using by_index_decrypt, by_name_decrypt, by_path_decrypt, or password-enabled by_index_with_options can therefore accept modified plaintext without an authentication error. This issue is fixed in version 9.0.0.

The advisory is available at github.com. This vulnerability was named CVE-2026-115906 since 10/23/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 9.0.0 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• zip-rs

Name

• Zip

Version

• 8.x

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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